In my opinion the Scout/R, which you say he has, and the Big Hit, are kissing cousins. They are balls with a medium high RG cores, for length, polished pearl coverstocks, also for length, and cores with a high RG differential flip blocks off a basic pancake block for a lot of backend on a dry condition. These two balls, if drilled relatively closely, should be very similar in overall ball reaction. Even with different drillings they will not have ahuge difference in overall oil handling and hook. The Wild is a slight variation on the Scout/R, more made for marketing value.
What is the Messenger BRT that you say he has?
There's Messenger Black/Gold pearl, a Messenger Blue/Silver/Pink pearl, and a Wicked BRT.
Unless you know what he wants, you and we can't really help him.